Press-board for molding-machines



(No Model.)

G. J. KEENA-N.

PRESS BOARD FOR MOLDING MACHINES.

No. 489,013. Patented Jan. 3, 1893.

m: Nehru: PETERS nomu'ro-urno. WASHINGTON, a. c.

UNITED STATES PATENT OFFICE.

GEORGE J. KEENAN, OF BUFFALO, NEW YORK.

PRESS-BOARD FOR MOLDING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 489,013, dated January3, 1893.

Application filed June 5, 1891- Serial No. 395,227- CN'o model.)

To all whom it may concern.-

Be it known that I, GEORGE J. KEENAN, a citizen of the United States,residing at Buffalo, in the county of Erie and State of New York, haveinvented a new and useful Press- Board for Molding-Machines, of whichthe following is a specification.

This invention relates to press boards for molding machines for thepurpose of compressing the sand around the patterns that have beenplaced in flasks for molding, and it has for its object to provide apress board by the use of which the sand may be compressed evenly aroundor against the pattern or patterns, and be tucked around the same asperfectly as it might be done by hand.

My invention consists in the improved construction of the said pressboard which will be hereinafter fully described, and particularlypointed out in the claim. 7

In the drawings hereto annexedFigur 1 is a perspective view of myimproved press board. Fig. 2 is a vertical sectional view showing thelatter in position for operation.

Like numerals of reference indicate like parts in both the figures ofthe drawings.

This press board is especially adapted to be used in connection with animproved flask which has been made the subject of a separate applicationfor Letters Patent Serial No. 395,226. Said flask, which is designatedby 1, receives the press board 4:, which may be of any desired sizeprovided that it is larger than the flask and projects beyond the edgesof the latter. The press board is provided on its under side withprojections 5 and with recesses or concavities 6, which are made tocorrespond with any recesses or projections of the pattern 7 which hasbeen placed in the flask as will be readily seen in the drawings.-

The press board is also provided with perforations 8 to admit of thepassage of the sprues 9 which are attached to, or form part of thepattern from which they project upwardly through the flask and mold soas to avoid the necessity of subsequently gouging the gates or pourholes.

The press board is provided with an integral handle 10, by which it maybe mounted in a machine of suitable construction by means of which itmay be operated to force it downwardly against the flask, the sand inwhich is thus compressed around the pattern. The projections andrecesses on the under side will serve to pack the sand evenly around thepattern as will be readily understood and the screw or sprues willextend through the perforations formed in the press board for theirpassage.

As illustrated, the press board is further provided on its under sidewith an integral downwardly extending rectangular flange 11, adapted tofit within a flask 12 of ordinary construction, said flange beingarranged within the outer edge of the press-board, so that the outeredge of the press-board overlaps and contacts with the upper edge of theflask and thus limits the movement of the pressboard, such constructionproviding an off stand integral stop ledge.

The entire press board is made of a single piece and also provided withthe projections 5 and recesses or concavities 6. In use the flange 11serves to out or press the sand at the edges of the flask against thepattern in the same manner as the sand is usually tucked by the operatoreither with his fingers or with the peener sometimes employed.

It is obvious that the projections 5 and recesses or concavities 6 ofthe press board are in all instances to conform to the pattern; hence itis evident that in some instances projections alone, and in otherinstances recesses only will be used.

Having thus described my invention, what I claim is- The combination ofa flat press-board, for comprising the sand in molders flasks, providedwith an integral handle, an irregular under surface, verticalperforations therein, and an integral downwardly-extending rectangularflange adapted to snugly register with the inner diameter of the flaskand arranged in from the outer edges of the board to leave an integralstop ledge adapted to overlap and contact with the upper edge of theflask and limit the play of the board, and the pattern within the flaskconforming to the irregular under surface of the press board andprovided with upwardly extending sprues adapted to work through thevertical perfoaillliillslll the press board, substantially as set ort Intestimony that I claim the foregoing as my own I have hereto affixed mysignature in presence of two witnesses.

GEORGE J. KEENAN.

Witnesses:

ELLIS KEENAN, J r., O. E. SHEPHERD.

